/*
 * Copyright 2023 AntGroup CO., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

package com.antgroup.geaflow.model.graph.message;

import java.util.List;

public class ListGraphMessage<K, MESSAGE> implements IGraphMessage<K, MESSAGE> {

    private final K targetVId;
    private final List<MESSAGE> messages;
    private final int size;
    private int idx;

    public ListGraphMessage(K targetVId, List<MESSAGE> messages) {
        this.targetVId = targetVId;
        this.messages = messages;
        this.size = this.messages.size();
        this.idx = 0;
    }

    public List<MESSAGE> getMessages() {
        return this.messages;
    }

    @Override
    public K getTargetVId() {
        return this.targetVId;
    }

    @Override
    public boolean hasNext() {
        return this.idx < this.size;
    }

    @Override
    public MESSAGE next() {
        MESSAGE message = this.messages.get(this.idx);
        this.idx++;
        return message;
    }

    @Override
    public String toString() {
        return "ListGraphMessage{" + "targetVId=" + targetVId + ", messages=" + messages + '}';
    }

}
